package com.atguigu.springcloud.controller;


import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import java.net.URI;
import java.util.List;

@RestController
@RequestMapping
@Slf4j
public class OrderController {

//    public static final String PAYMENT_URL = "http://localhost:8001";

    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private LoadBalancer loadBalancer;

    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(@RequestBody Payment payment){

//        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment, CommonResult.class);
        return restTemplate.postForEntity(PAYMENT_URL+"/payment/create",payment,CommonResult.class).getBody();


    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult getPayment1(@PathVariable("id") Integer id){
//        getForObject获取到的值是json串
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getEntity/{id}")
    public CommonResult getPayment2(@PathVariable("id") Integer id){
//        获取到的值是ResponseEntity,包含了一些重要的信息报告头信息
       ResponseEntity<CommonResult>  entity= restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
                if (entity.getStatusCode().is2xxSuccessful()){
                    return entity.getBody();
                }else {
                    return new CommonResult(444,"操作失败！！");
                }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLb(){

        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (instances == null || instances.size() <= 0){
            return  null;
        }
        ServiceInstance serviceInstance = loadBalancer.instance(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

}
